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https://issues.apache.org/jira/browse/HIVE-2939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Igor Kabiljo updated HIVE-2939:
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Priority: Minor (was: Major)
> LazyArray.getList changes array it previously returned
> -------------------------------------------------------
>
> Key: HIVE-2939
> URL: https://issues.apache.org/jira/browse/HIVE-2939
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 0.8.1
> Reporter: Igor Kabiljo
> Priority: Minor
>
> Simple query like:
> SELECT a, e
> FROM ikabiljo_test_string_array
> LATERAL VIEW EXPLODE(a) x1 AS e
> (table contains one column - ARRAY<STRING> - and has one row - [b,c,a] )
> fails with ConcurrentModificationException, since LazyArray.getList changes
> the cached array it returns.
> LazyArray.getList can easily:
> - return cached array if present, without clearing and refiling. Hive is
> already not going to work properly if you change input parameters in an UDF.
> If that doesn't sound good - it can return Collections.unmodifiableList
> - or just not cache anything
> Same is true for LazyMap.getMap
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